IceCube neutrino point-source searches in the direction of the KM3NeT ultra-high-energy event

IceCube Collaboration; R Abbasi; M Ackermann; J. Adams; J. A Aguilar; M Ahlers; J M Alameddine; S Ali; N. M Amin; M Hostert

doi:10.48550/arxiv.2609.10931

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IceCube neutrino point-source searches in the direction of the KM3NeT ultra-high-energy event

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IceCube neutrino point-source searches in the direction of the KM3NeT ultra-high-energy event

IceCube Collaboration, R Abbasi, M Ackermann, J. Adams, J. A Aguilar, M Ahlers, J M Alameddine, S Ali, N. M Amin and M Hostert

arXiv

09/10/2026

DOI: 10.48550/arxiv.2609.10931

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https://doi.org/10.48550/arxiv.2609.10931View

Preprint (Author's original) This preprint has not been evaluated by subject experts through peer review. Preprints may undergo extensive changes and/or become peer-reviewed journal articles. Open Access

Abstract

While still under construction, the KM3NeT Astroparticle Research with Cosmics in the Abyss (ARCA) detector recorded a∼ 200 PeV neutrino on February 13th, 2023. This event is the highest-energy neutrino reported. IceCube, a cubic kilometer neutrino detector located at the geographic South Pole, has previously detected neutrinos up to approximately 10 PeV. We search for high-energy neutrinos from the location of the KM3NeT event using 15 years of IceCube data and considering three temporal hypotheses: steady or flaring in time coincidence, or at an arbitrary time. We find no evidence for neutrino emission for any of the studies performed. Correspondingly, we set upper limits on the neutrino flux from a point source in the direction of KM3-230213A. We compare these limits to KM3NeT's estimated flux and show that an astrophysical explanation of this event is strongly constrained for a variety of spectral assumptions for a steady or transient point source with the flux inferred from the single KM3NeT ultra-high-energy event assuming a spectral index of 2.0.

Physics - High Energy Astrophysical Phenomena

Details

Title: Subtitle: IceCube neutrino point-source searches in the direction of the KM3NeT ultra-high-energy event
Creators: IceCube Collaboration
R Abbasi (Contributor) - Loyola University Chicago
M Ackermann (Contributor) - Deutsches Elektronen-Synchrotron DESY
J. Adams (Contributor) - University of Canterbury
J. A Aguilar (Contributor) - Université Libre de Bruxelles
M Ahlers (Contributor) - University of Copenhagen
J M Alameddine (Contributor) - TU Dortmund University
S Ali (Contributor) - University of Kansas
N. M Amin (Contributor) - University of Delaware
M Hostert (Contributor)
Resource Type: Preprint
Publication Details: arXiv
DOI: 10.48550/arxiv.2609.10931
ISSN: 2331-8422
Publisher: arXiv
Language: English
Date posted: 09/10/2026
Academic Unit: Physics and Astronomy
Record Identifier: 9985226072502771

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